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![Photo 1 of [Upgraded] Hon&Guan Duct Damper 4 inch, Backdraft Damper One-Way Airflow Vent Damper Backflow Preventer for 4 Inch Duct Dryer Vent Hose-2pcs](https://images-na.ssl-images-amazon.com/images/I/61koTtnpDuL.jpg)
![Photo 2 of [Upgraded] Hon&Guan Duct Damper 4 inch, Backdraft Damper One-Way Airflow Vent Damper Backflow Preventer for 4 Inch Duct Dryer Vent Hose-2pcs](https://firebasestorage.googleapis.com/v0/b/nellishr-cbba0.appspot.com/o/processing-photos%2F1041248959%2FY4vok9bCbFyDB2lUNmS3W.jpeg?alt=media&token=9171d69e-170d-4cd8-b2da-057f2cbf271a)